US3977421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Buffing machine
Assignee: Individual
•
Filing: 1973-04-19
•
Granted: 1976-08-31
•
Expires: 1993-04-19
Abstract
Abstract Buffing machine comprising rotary buffing element, internal combustion engine motor for driving the buffing element and fuel tank for liquefied gas with suitable connections to supply fuel to motor.
Inventors
- 👤 Burke R. Fallen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:07
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4036; A47L11/4038; A47L11/02; A47L11/10; A47L11/14; A47L11/16; A47L11/4063; A47L11/4069; F; F17; F17C; F17C13/00; F17C13/08; F17C13/084; F17C13/085; F17C2205/00; F17C2205/01; F17C2205/0153; F17C2205/0157; F17C2205/0161; F17C2205/03; F17C2205/0302; F17C2205/0338; F17C2250/00; F17C2250/06; F17C2250/0605; F17C2250/0636
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
A buffing machine for polishing floors having a hard, nominally non-buffable finish thereon comprising: a wheel mounted support adapted for movement over the floor surface to be buffed; a disc-shaped fibrous buffing pad mounted on said support for rotation about the center of said pad and in floor surface engaging position; an internal combustion motor mounted on said support and connected for rotationally driving said pad at an operating speed of up to at least about 1,000 RPM, said motor being fueled by liquid gas; a liquid gas fuel tank carried by said support; and a valve and fuel supply line connecting said tank and motor for controlling the operation of said motor.
Claim 2
Dependent Claim
113 words
A buffing machine for polishing floors having a hard, nominally non-buffable finish thereon comprising: a wheel mounted support adapted for movement over the floor surface to be buffed; a disc-shaped fibrous buffing pad mounted on said support for rotation about the center of said pad and in floor surface engaging position; an internal combustion motor mounted on said support and connected for rotationally driving said pad at an operating speed of up to at least about 1,000 RPM, said motor being fueled by liquid gas; a liquid gas fuel tank carried by said support; and a valve and fuel supply line connecting said tank and motor for controlling the operation of said motor.
Claim 3
Independent Claim
62 words
A method of polishing indoor floors having a hard, nominally non-buffable finish material thereon comprising: applying to said finish material a disc-shaped fibrous buffing pad; and revolving said pad about its center by means of a liquified gas driven internal combustion motor and with said pad in contact with said material and at an operating speed of at least about 1,000 RPM.
Claim 4
Independent Claim
62 words
A method of polishing indoor floors having a hard, nominally non-buffable finish material thereon comprising: applying to said finish material a disc-shaped fibrous buffing pad; and revolving said pad about its center by means of a liquified gas driven internal combustion motor and with said pad in contact with said material and at an operating speed of at least about 1,000 RPM.
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |